The Science Advisory Committee (SAC) is composed of international experts from large synchrotron laboratories and researchers of related areas which meet regularly to review the operation of the Brazilian Synchrotron Light Laboratory (LNLS). The Committee is also responsible for evaluating the infrastructure improvement projects, as well as research and development projects carried out by Laboratory staff.
The Scientific Committee comprises the following members:
| Andrew Peele | Australian Synchrotron, ANSTO | Australia |
| Féliz Gregório Requeijo | INIFTA (CONICET and UNLP) | Argentina |
| Glaucius Oliva | Instituto de Física de São Carlos (IFSC), Universidade de São Paulo (USP) | Brazil |
| Gwyndaf Evans | Diamond Light Source | United Kingdom |
| Ian McNulty | MAX IV Laboratory | Sweden |
| Jean Susini (Chair) | European Synchrotron Radiation Facility (ESRF) | France |
| Jinghua Guo | Advanced Light Source (ALS), Lawrence Berkeley National Laboratory | USA |
| Jonathan Lang | Advanced Photon Source (APS), Argonne National Laboratory | USA |
| Maria Luiza Rocco Duarte Pereira | Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ) | Brazil |
| Nádya Pesce da Silveira | Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS) | Brazil |
| Nicholas Bernard Brookes | European Synchrotron Radiation Facility (ESRF) | France |
| Qun Shen | National Synchrotron Light Source II (NSLS-II), Brookhaven National Laboratory (BNL) | USA |
| Rogério Magalhães Paniago | Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG) | Brazil |